Fix installation of *.u files.
Fix installation of *.u files.

	* share/urbi/local.mk (urbidir): New, so that we have file
	installed as urbi/*.u.
	Use wildcard instead of maintaining by hand a list which is never
	up to date.

aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi